Methanesulfonic acid 12,12,13,13,14,14,15,15,16,16,17,17,18,18,19,19,19-heptadecafluoro-nonadecyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 177161-62-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,7,1,6 and 1 respectively; the second part has 2 digits, 6 and 2 respectively. Calculate Digit Verification of CAS Registry Number 177161-62: (8*1)+(7*7)+(6*7)+(5*1)+(4*6)+(3*1)+(2*6)+(1*2)=145 145 % 10 = 5 So 177161-62-5 is a valid CAS Registry Number.